On this day, 83 years ago, on February 25, 1942 (January 11, 1942 in the lunar calendar), the China Expeditionary Force entered Myanmar. On February 25, 1942, the China Expeditionary Force of about 100,000 people began to enter Myanmar and cooperated with the British and Burmese troops to fight against Japan, which dealt a heavy blow to the Japanese army. On May 31, the expeditionary force began to withdraw due to the reversal of the situation. By early August, one group had retreated to India (renamed the Indian Army), and the other had retreated to the western Yunnan border. On May 1, more than 50,000 Japanese and puppet troops began an unprecedented large-scale "mopping up" of the Anti-Japanese Base Area in Central Hebei. After two months of arduous struggle, our army fought 272 times and killed and injured more than 11,000 enemy people. At the same time, our base areas also suffered severe damage. During the enemy's "cleanup" phase alone, more than 50,000 people were killed, injured, and captured. The entire base area was divided into several small areas, making it extremely difficult for the troops to operate. On December 12, Liberation Daily published an editorial titled "Actively Implementing the 'Nanniwan Policy'", calling on all troops to learn from the 359th Brigade's experience in reclamation. As a result, the large-scale production movement was fully launched. The large-scale production movement laid the material foundation for the military and civilians in the base areas to independently persist in the war of resistance behind enemy lines for a long time.